ST GABRIEL ORGANICS 40040-8 Organ Moss Killer, 24-Ounce 24 Oz. Ready-to-use, Organic Moss Killer Formula Is Made From Essential Oils, And Soap Kills Moss In A Matter Of Hours Spray Directly On Bricks, Concrete, Or Anywhere Moss Is Growing; Do Not Spray On Grass Designed With In A Spray Bottle, With Trigger Sprayer